Abstract
Titanium dioxide (TiO2) is the commonly used photocatalyst. However, because only a small ultraviolet portion of solar spectrum can excite the electron-hole pairs resulting from the large band gap (3.2 eV) [1] and the recombination rate is high, its efficiency is restrained. To overcome this drawback, we added silver nanoparticles and reduced graphene oxide (RGO) to construct the ternary plasmonic catalyst to improve the catalytic performance of TiO2 nanopowder (P25). We prepared three different geometries of Ag nanostructures including sphere, decahedron and prism because the plasmon resonance properties of Ag could be controlled by the morphology of Ag nanoparticle, which shows characteristic strong localized surface plasmon resonance (LSPR) leading to an increase in light absorption [2]. The incorporated RGO inhibited the charge recombination and enhanced the electron-hole separation. In this study, Ag nanodecahedrons/P25/RGO and Ag nano-prisms/P25/RGO hybrid photocatalysts possessed remarkable photocatalytic activity, which displayed over 8 times higher photocatalytic efficiency than the P25 photocatalyst.
© 2017 Japan Society of Applied Physics, Optical Society of America
PDF ArticleMore Like This
Bo-Kai Chao, Ti Li, Yu-Lin Kuo, and Chun-Hway Hsueh
13a_C302_7 JSAP-OSA Joint Symposia (JSAP) 2016
Chang Liu, Qin Kuang, Zhaoxiong Xie, and Lansun Zheng
NSa2A.4 Nanophotonics, Nanoelectronics and Nanosensor (N3) 2013
Hsin-Chia Ho, Min-Hsin Yeh, Bing-Joe Hwang, and Chun-Hway Hsueh
5p_A410_11 JSAP-OSA Joint Symposia (JSAP) 2017